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question about adding plastic cement to mortar mix?

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question about adding plastic cement to mortar mix? bdeditch 09-08-2006
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Posted by on September 9, 2006, 12:04 am

>I was told by some one that I should add some pure plastic cement to my
>mortar to install some cultured stone on a wall, said it would help
>stick better. What would be a good amount to add to the mortar mix.
>percentage wise?
It is easier to just buy "bonding" mortar that already has the latex
in it. If you really want the stuff to stick spend about twice as much
and buy "flex" but that is usually overkill. I put some pavers on a
wall with flex, because that is what I had, and when I tried to chip
one out I ended up having to break it out in little pieces and cut the
mortar out with an air chisel.

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Posted by m Ransley on September 9, 2006, 7:55 am
Never heard of it.


Posted by on September 9, 2006, 11:04 am
On Sat, 9 Sep 2006 06:55:39 -0500, ransley@webtv.net (m Ransley)
wrote:

>Never heard of it.

Bonding mortar and flex?
Look in the tile department

Posted by Italian Mason on September 9, 2006, 4:21 pm
Plastic cement is a portland based cement used primarily for stucco
applications it for the most part is treated exactly like regular
portland cement as far as mixing and applications. adding a hand full
to a bagged mix of mortar wil increase the stickeyness while adding a
bit of strength. You could also use lime to increase the stick but I
use the cement because in my experiance it really increases the surface
bond strength where as the lime just adds a bit of stick. Depending on
the stone the bagged mix even a "spec mix" is still a little light on
the cement to make a good quick bond.


bdeditch wrote:
> I was told by some one that I should add some pure plastic cement to my
> mortar to install some cultured stone on a wall, said it would help
> stick better. What would be a good amount to add to the mortar mix.
> percentage wise?


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